Miter-box.



'PATBNTED JAN. 3, 1905.

A. VON GUNTEN.

MITER BOX.

APPLIOATION FILED HAY 23. 1903.

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PATBNTED JAN. 3, 1905.

A. VON GUNTEN.

MITER BOX.

APPLICATION FILED MAY 23. 1903.

3 SHEETS-SHEET 2.

PATENTED JAN. 3, 1905.

A. VON GUNTEN.

MITER BOX.

APPLICATION FILED MAY 23,1903.

3 SHEETS-SHEET 3.

A TTORNE Y8.

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UNITED STATES Patented January 3, 1905.

PATENT OEEIcE.

MlTER-BOX.

SPECIFICATION forming part of Letters Patent No. 779,333, dated January 3, 1905.

Application filed May 23, 1903. Serial No. 158,492.

To all whom it may concern.-

Be it known that I, ALBERT Von GUNTEN, a citizen of the United States of America, and a resident of St. Charles, in the county of St. Charles and State of Missouri, have invented a new and useful Miter-Box, of which the following is a complete specification.

My invention relates to miter-boxes of that form in which the saw-frame swings about a vertical axis and also tilts about a horizontal axis to permit the saw to stand in a plane inclined to the vertical;' and it consists in the novel construction and arrangement of parts hereinafter described and claimed.

' Figure 1 is a top plan view. Fig. 2 is a front elevation, partly in section. Fig. 3 is a vertical transverse section on line 3 3 of Fig. 1. Fig. 4 is a rear elevation. Fig. 5 is an inverted plan view, and Fig. 6 is a perspective view, of the back plate and bed-plate or frame.

In the drawings the numeral 1 indicates the back plate, and 2 the bed-plate. These (see Fig. 6) are made ofone single skeleton piece. The back plate 1 has in its center obliquelydisposed edges (0 a, forming a right angle, so that the saw when tilted from a vertical plane may swing between said edges, as shown in dotted lines, Fig. 4. In the bed-plate 2 at its center is a triangular depression along the brace-line 3 3, within which depression is a quarter-circle track 4, on the bottom edge of On top of the bed-plate is a floor 32. On the outer ends of the bed-plate 2 are secured the legs 6. On top of bed-plate at each end is a groove 7, extending transversely.

To the back plate 1 is secured a rotary adj ustable back 8, swiveling within-a half-circle plate 10 about a horizontal axis. This has a circular inside tongue or flange that enters a circular groove in the rotary adjustable back 8 and permits the latter to tilt from right to left in the plane of the back plate 1. This adjustable back has a vertical slot or groove 13, which extends from the center its entire height to receive the saw. On the top of this adjustable back is a cross flange-guide 14 to receive the saw-back. This rotary back is ribbed and ofiset at 12 on each side of the slot or groove to extend out flush with the back plate 1 (see Fig.' 1) for the material to rest. against.

Under the bed-plate 2 is pivoted on a vertical axis 15, Fig. 3, a swinging lever 16, which is disposed horizontally and has upturned ends 17 to receivethe rocking bar 24, which is arranged parallel to and just above lever 16. In the swinging lever 16 are secured the lock-bars 18 and 19', the lever being made channeled underneath to receive them. These lock-bars are arranged longitudinally within the swinging lever 16 and are pivoted to the side walls of the lever, as indicated at 20 and 21. Lock-bar 18 has an upturned tooth that engages the notches of the quarter-circle track 4 of bed-plate 2. Lock-bar 19 has an upturned tooth at its end that engages teeth on the quarter-circle track 22 of the rocking bar 24. The teeth of these lock-bars are retained in the notches of their respective arcs by springs 23 and 23, which rest on the outer end of lock-bars 18 and. 19. The notched arch track 22 is in a vertical plane, (see Fig. 4,) while track 4 is in a horizontal plane. Lock-bars 18 and 19 terminate each in a thumbpiece, same being curved upward, as shown. The toothed ends of these lock-bars are turned inward to the middle line of the lever 16, as shown in Fig. 5.

24 is the rocking bar, which is pivotally secured at its opposite ends to the upturned ends 17 of the swinging lever 16 by means of a suitably-threaded bolt 17%, which will permit the bar to rock about a horizontal axis.

On the bar 24 are terminally secured the vertical saw-guide posts 25. These are hollow through their entire length and are split or slotted down to the top of bar 24. These hollow saw-guide posts carry within them tubular saw-guides 26. These saw-guides have an enlarged head or top 27 which are crosshollowed and are split or slotted nearly their entire length to receive the saw, and each one rests on a socket-ring 28 in the bottom of the split post 25. This ring rests on a set-screw 29, which is in a threaded angle-piece 30, fixed to the lower edge of rocking bar 24, its purpose being to limit the downward movement of the saw after it has passed through the material, preventing injury to saw from contact with metal parts below. The lifting of the thumb-pieces of the lock-bars 18 and 19 and the horizontal shifting of the swinging lever 16 about its vertical center 15 and the tilting of the rocking bar 24 to the required angle are the only manipulations required for any different cut or angle.

31 is a split box which receives the rocking bar 24. This split box 31 rises flush to the top of the board of floor 32 on bed-plate 2 and is open at its opposite ends to admit the tilting bar 24 and is clamped to said rocking bar by means of a threaded screw 33, Fig. 3, and is hinged to the bed-plate 2 about the vertical axis 15 by a bolt preferably countersunk on top and arranged underneath rocking bar 24 and passing through the bed-plate 2 and connecting the swinging lever 16 to the bed-plate, so as to swing horizontally. The floor 32 is simply two boards cut at their inner edges in the shape of a right angle along the divergent lines 2 and 3.

34 represents curved movable base-plates, one of which is fastened at each end of back plate 1 and rests flat on a lug or car 35, being secured by means of a threaded thumb-screw 36 at a point near the back plate 1, which passes through a slot in the base-plate. On the short curve 37 of the base-plate is fixed a short pin 38, which extends downward and moves in the transverse groove 7 of the bedplate. On the upper side of each curved plate 34 near the short curve 37 there is erected a long back-rest pin 39. This pin forms an adjustable back-rest for lumber and is intended when the curved base-plate 34 is moved longitudinally and set with screw 36 to the scale 40 of said curved movable plate 34 as a back for the material in the place of back 1. By this means material can be cut at an angle of seventy-six degrees.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is v 1. The combination in a miter-box, of a back plate and a bed-plate, a hollow swinging lever pivotally secured below the bed-plate, on a vertical axis, lock-bars arranged Within and pivoted to the side walls of said lever and having upturned ends, springs for said lockbars; a rocking saw-guide carrier pivoted in the upturned ends of the lever and having on its lower side a transverse notched circle-bar arranged in a vertical plane and engaging one of the lock-bars, and a second notched circlebar disposed in a horizontal plane and engaged bylthe other lock-bar substantially as specifiec.

2. In a miter-box, the combination of a back plate and a bed-plate, a swinging lever pivotally secured below the bed-plate about a vertical axis and having upturned ends, a rocking bar pivoted in said upturned ends and having at. its opposite ends upright sawguide posts, saw-guides within said saw-guide posts, saw-guide-supporting rings, set-screws secured to the rocking bar to hold said rings and limit the downward movement of the saw, a notched circle-bar fixed to the rocking bar, a lock-bar engaging the notched circle-bar for determining the rotary adjustment of the rocking bar, and a split box secured around the rocking bar and pivoted to the bed-plate in the plane of the back plate, substantially as specified.

3. In a miter-box, the combination of a back plate and a bed-plate, a swiveling selfadjustable back mounted in guides on the rear side of the back plate and having a slot to receive the saw; said self-adjustable back having on each side of its slot an inwardlyfiaring flange extending flush to the plane of the front side of the back plate, and having also on its top a guide to receive the back of the saw, substantially as specified.

4. In a miter-box, the combination of a back plate, a bedplate having transverse grooves at its ends, a curved movable backrest adjustably attached to each outer end of the back plate, said curved movable back-rest having at a point near one end, adownwardlyprojecting guide pin or bar moving in the groove of the end of the bed-plate, an upwardly-projecting bar or pin to receive the material to be sawed, said movable back having a fixed scale by which the movement of the upwardly-projecting bar or pin may be measured, substantially as specified.

ALBERT VON GUNTEN.

Witnesses:

B. H. DYER, OsMUND HAENssLER. 

